Q28 / 120 · NEET 2010 (Mains) · Chemistry

A $0.66 \mathrm{~kg}$ ball is moving with a speed of $100 \mathrm{~m} / \mathrm{s}$. The associated wavelength will be (h $\left.=6.6 \times 10^{-34} \mathrm{Js}\right)$

  • A
    $6.6 \times 10^{-32} \mathrm{~m}$
  • B
    $6.6 \times 10^{-34} \mathrm{~m}$
  • Correct answer
    C
    $1.0 \times 10^{-35} \mathrm{~m}$
  • D
    $1.0 \times 10^{-32} \mathrm{~m}$

Solution

From de-Broglie equation, $$ \lambda=\frac{\mathrm{h}}{\mathrm{mv}}=\frac{6.6 \times 10^{-34}}{0.66 \times 100}=10^{-35} \mathrm{~m} $$

Hence, the correct answer is option: 'C'.

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